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llvm-premerge-checks/scripts/ignore_diff.py

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#!/usr/bin/env python3
# Copyright 2020 Google LLC
#
# Licensed under the the Apache License v2.0 with LLVM Exceptions (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://llvm.org/LICENSE.txt
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
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import argparse
import logging
import re
import sys
import pathspec
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def remove_ignored(diff_lines, ignore_patterns_lines):
logging.debug(f'ignore pattern {ignore_patterns_lines}')
ignore = pathspec.PathSpec.from_lines(pathspec.patterns.GitWildMatchPattern, ignore_patterns_lines)
good = True
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result = []
for line in diff_lines:
match = re.search(r'^diff --git (.*) (.*)$', line)
if match:
good = not (ignore.match_file(match.group(1)) and ignore.match_file(match.group(2)))
if not good:
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logging.debug(f'skip {line.rstrip()}')
continue
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result.append(line)
return result
if __name__ == "__main__":
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# Maybe FIXME: Replace this tool usage with flags for tidy/format, use paths relative to `__file__`
parser = argparse.ArgumentParser(description='Takes an output of git diff and removes files ignored by patten '
'specified by ignore file')
parser.add_argument('ignore_config', default=None,
help='path to file with patters of files to ignore')
parser.add_argument('--log-level', type=str, default='WARNING')
args = parser.parse_args()
logging.basicConfig(level=args.log_level)
filtered = remove_ignored([x for x in sys.stdin], open(args.ignore_config, 'r').readlines())
for x in filtered:
sys.stdout.write(x)